Ear, MiddleChinchillaOtitis MediaLabyrinthitisCholesteatoma, Middle EarInflammationEarOtitis Media with EffusionEar OssiclesTympanic MembraneEar DiseasesEar, InnerEustachian TubeMiddle Ear VentilationEar NeoplasmsEar CanalAcoustic Impedance TestsEar, ExternalMalleusStapesOtoscopyMastoidTemporal BoneHearing Loss, ConductiveIncusOtologic Surgical ProceduresOssicular ProsthesisTympanoplastyStapediusInflammation MediatorsRound Window, EarTensor TympaniHearingBone ConductionHaemophilus influenzaeDisease Models, AnimalHearing LossTympanic Membrane PerforationStapes SurgeryOtitis Media, SuppurativeCholesteatomaMice, Inbred C57BLEar CartilageStreptococcus pneumoniaeOtoacoustic Emissions, SpontaneousHaemophilus InfectionsNasopharynxCochleaHearing Loss, Mixed Conductive-SensorineuralOtosclerosis